for historical reference, this webpage also includes 20th Century still-image transmission devices, which were a less functional form of conventional videophones (and which are not to be confused with today's Video-enabled UMTS mobile phones, or camera-cellphones);

there are also other separate media repository articles and categories for:

Videoconferencing Systems and Components (for one-to-many and many-to-many conference calls using a Multipoint Control Unit (MCU), or its equivalent, unlike Videophones which are meant for one-to-one calls without an MCU)